/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMStruct.h
Returns a variable given a name (or a non-valid variable if not found)
[FRigVMExternalVariable](API\Plugins\RigVM\RigVMCore\FRigVMExternalVariable) FindVariable ( [FName](API\Runtime\Core\UObject\FName) InVariableName ) const